一个数是合数，下面说法错误的是（　　）

A．它不可能是质数

B．它至少有三个因数

C．它可能是偶数也可能是奇数

D．它一定是2的倍数

— You seemed to be impressed by his skill.    

— Not exactly so. It was his courage _____ his skill that  really impressed me.    [ ]

A. rather than                      

B. as well as    

C. but also                          

D. together with